If *print-escape* is true,
lowercase characters in the name of a symbol
are always printed in lowercase, and
are preceded by a single escape character
or enclosed by multiple escape characters;
uppercase characters in the name of a symbol
are printed in upper case, in lower case, or in mixed case
so as to capitalize words, according to the value of
*print-case*. The convention for what constitutes
a "word" is the same as for string-capitalize.